# Conversion error

**URL:** <https://community.cesium.com/t/conversion-error/2076>\
**Category:** CesiumJS\
**Created:** [March 1, 2015, 4:19pm UTC](https://community.cesium.com/t/conversion-error/2076 "2015-03-01T16:19:11Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![Satish\_Kashyap](https://avatars.discourse-cdn.com/v4/letter/s/9de053/32.png) [@Satish\_Kashyap](https://community.cesium.com/u/Satish_Kashyap)\
**Post date:** [March 1, 2015, 4:19pm UTC](https://community.cesium.com/t/conversion-error/2076/1 "2015-03-01T16:19:11Z")

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Have been trying to convert a wind turbine (standard and animated) collada model to glTF. The turbine was saved using SketchUp. The conversion results in a turbine with only one blade. Tried the online conversion and the colladatoglTF from command line with the -e option. Please suggest.

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**Author:** ![Matt\_Amato](https://sea2.discourse-cdn.com/cesium/user_avatar/community.cesium.com/matt_amato/32/1993_2.png) [@Matt\_Amato](https://community.cesium.com/u/Matt_Amato)\
**Post date:** [March 1, 2015, 8:02pm UTC](https://community.cesium.com/t/conversion-error/2076/2 "2015-03-01T20:02:39Z")

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It’s hard to say without the model, but it may be related to this bug: [https://github.com/AnalyticalGraphicsInc/cesium/issues/1754](https://github.com/AnalyticalGraphicsInc/cesium/issues/1754) Which is currently being worked on in the gltf-instancing branch.

If you want to try building that branch from source, you can confirm that it is indeed the issue. Otherwise, if you can share the model; it should be easy for us to check.